Back in 2002, when the Illinois Supreme Court ruled that Vernon Schultz’s engineering expert could rely on Occupational Safety and Health Administration regulations as supporting his testimony that a railroad breached the applicable standard of care under the Federal Employers’ Liability Act by failing to have a guardrail at the top of a 6 ½ foot high retaining wall — even though the OSHA regulations didn’t apply to railroads — the high court explained that (1) “these regulations …